A New Begomovirus Causes Tomato Leaf Curl Disease in Baja California Sur, Mexico

Plant Disease
R J Holguín-PeñaR F Rivera-Bustamante

Abstract

More than 10,000 ha of tomatoes are grown in the field and greenhouses on the Baja California Peninsula of Mexico. Information about the etiology of geminivirus-like diseases affecting tomato crops in all horticultural regions in the area has been difficult to obtain and assess. From 2001 through 2003, stunting, foliar discoloration, reduced leaf size, and leaf crumpling symptoms were observed and analyzed in one large area of tomato plantings in El Carrizal (near the city of La Paz in Baja California Sur). This leaf curl disease resembled that caused by Chino del tomate virus and has been observed at levels of incidence ranging from 60 to 90%. DNA isolated from symptomatic plants was analyzed using DNA hybridizaton and polymerase chain reaction (PCR) amplification of the 5' regions of the replication and coat protein genes, including the intergenic region (3). Comparisons of the nucleotide sequence (GenBank Accession No. AY339619) with corresponding sequences in GenBank resulted in 84.2% identity with Tomato mild mottle virus and 61.7% with Tomato severe leaf curl virus; both isolates originate from Central America. The relatively low nucleotide sequence identities from its closest relatives suggested that the virus may be a n...Continue Reading

Citations

Jun 12, 2012·Archives of Virology·B Bañuelos-HernándezG R Arguello-Astorga

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